Adjustable and pivotable seat

ABSTRACT

An adjustable and pivotable seat includes a base, a backrest plate and an adjusting rod. The base has a receiving portion disposed on one end of the base and a receiving space defined in the receiving portion, and an opening inclinedly defined through the receiving portion. The backrest plate is pivotally connected with the base and has a series of teeth disposed on the backrest plate and a series of slots respectively defined in between the series of teeth. The series of teeth is correspondingly and movable received in the receiving space in the base. The adjusting rod is selectively inserted into the opening and selectively engages one of the series of slots. Therefore, the backrest plate is pivotable relative to the base and an angle between the backrest plate and the base is adjustable.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a seat, and more particularly to anadjustable and pivotable seat.

2. Description of Related Art

A conventional seat includes a base, a back, and a connector. The basehas a bottom provided for mounting an air pressure pump to adjust aheight of the base. The back is mounted on the base. The connector is aL-shaped steel sheet and has a first end fixed on the base and a secondend being perpendicular to the first end and connected to the back. Thebase and the back are able to slightly pivot relative to each other dueto a steel restitution force of the connector.

However, a pivot angle of the back relative to the base is relied on thesteel restitution force of the connector and is restricted, such thatthe back of the conventional seat only provides a slightly elasticity.The pivot angle of the back relative the base is not truly adjustable.

To overcome the shortcomings, the present invention tends to provide anadjustable and pivotable seat to mitigate or obviate the aforementionedproblems.

SUMMARY OF THE INVENTION

The main objective of the invention is to provide an adjustable andpivotable seat that includes a base, a backrest plate and an adjustingrod. The base has a receiving portion disposed on one end of the base.The receiving portion has a receiving space defined in the receivingportion and an opening inclinedly defined through the receiving portion.The opening extends toward a bottom of the base and communicates withthe receiving space. The backrest plate is pivotally connected with thebase. The backrest plate has a series of teeth disposed on the backrestplate and a series of slots respectively defined in between the seriesof teeth. The series of teeth is correspondingly received in thereceiving space in the base and is movable relative to the receivingportion. Each slot is disposed between adjacent two of the series ofteeth and extends toward an upper part of the backrest plate which islocated higher than the series of teeth. The adjusting rod isselectively inserted into the opening and selectively engages one of theseries of slots. The adjusting rod has at least one connecting armextending from the adjusting rod for movably connecting with the base.

Other objects, advantages and novel features of the invention willbecome more apparent from the following detailed description when takenin conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of an adjustable and pivotable seat inaccordance with the present invention;

FIG. 2 is another perspective view of the adjustable and pivotable seatin FIG. 1;

FIG. 3 is an exploded perspective view of the adjustable and pivotableseat in FIG. 2;

FIG. 4 is an enlarged cross-sectional side view of a pivotal portion anda connecting portion of the adjustable and pivotable seat in FIG. 2;

FIG. 5 is an enlarged perspective view of the adjustable and pivotableseat in FIG. 2;

FIG. 6 is a side view of the adjustable and pivotable seat in FIG. 2;

FIG. 7 is an operational side view of the adjustable and pivotable seatin FIG. 6;

FIG. 8 is an enlarged operational cross-sectional side view of theadjustable and pivotable seat in FIG. 6; and

FIG. 9 is an exploded perspective view of the adjustable and pivotableseat in FIG. 2 cooperating with two sponges and two leather coats.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

With reference to FIGS. 1 and 2, an adjustable and pivotable seat inaccordance with the present invention comprises a base 10, a backrestplate 20, an adjusting rod 30 and at least one elastomer 40. Thebackrest plate 10 is hingedly mounted on the base 10. The adjusting rod30 is pivotally mounted on the base 10. Each elastomer 40 is providedfor connecting the adjusting rod 30 to the base 10.

With reference to FIGS. 3 to 4, the base 10 is a plate-like structureand has an inner side provided for sitting and an outer side opposite tothe inner side. The base 10 has two curved pivotal portions 11protruding from the base 10 for hingedly connecting with the backrestplate 20. The base 10 has at least one connecting hole 12 defined in theouter side of the base 10 for assembling with a supporting mechanism.The supporting mechanism can be an air pressure pump or a roller set.Each pivotal portion 11 has a receiving portion 111 protruding from thepivotal portion 11 and a pivotal hole 112 defined in a side of thepivotal portion 11 for hingedly assembling with the backrest plate 20.Each receiving portion 111 has a receiving space 113 defined in an innerside of the receiving portion 111, an opening 114 defined inclinedlydefined through the receiving portion 111 and communicating with thereceiving space 113, and a fixing groove 115 defined in a side of thereceiving portion 111. Each opening 114 inclinedly extends toward abottom surface of the outer side of the base 10.

The backrest plate 20 is a plate-like structure and has an inner sideprovided for resting a user's back and an outer side opposite to theinner side. The backrest plate 20 has two curved connecting portions 21protruding from the backrest plate 20 and respectively corresponding tothe two pivotal portions 11 for hingedly connecting with the two pivotalportions 11, such that the two connecting portions 21 are respectivelyreceived in the two pivotal portions 11 and are hingedly movable. Eachconnecting portion 21 has multiple teeth 22 protruding from theconnecting portion 21 and multiple slots 23 respectively defined inbetween teeth 22, such that each slot 23 is disposed between adjacenttwo of teeth 22. The teeth 22 of each connecting portion 21 are movablyreceived in the receiving space 113 in the receiving portion 111 of thecorresponding pivotal portion 11. Each slot 23 extends toward an upperpart of the backrest plate 20 which is located higher than the teeth 22.

With reference to FIG. 5, the adjusting rod 30 has at least oneconnecting arm 31 disposed on the adjusting rod 30, preferably, theadjusting rod 30 has two connecting arms 31 extending from the adjustingrod 30. Each connecting arm 31 is perpendicular to the adjusting rod 30and has a tip 32 extending inwardly from the connecting arm 31 forinserting into the corresponding fixing groove 115 in the receivingportion 111, such that the adjusting rod 30 is pivotable relative to thebase 10 at an axis of a linear connection of the two tips 32. Theadjusting rod 30 is selectively inserted into the two openings 114 ofthe two receiving portions 111 of the base 10 and is selectivelyreceived in two aligning slots 23 in the two connecting portions 21 ofthe backrest plate 20.

Preferably, an amount of the at least one elastomer 40 is two. The twoelastomers 40 are respectively mounted adjacent to the two receivingportions 111. Each elastomer 40 has two ends respectively fixed on theadjusting rod 30 and the fixing groove 115 of the adjacent receivingportion 111.

With reference to FIGS. 6 and 7, the backrest plate 20 is hingedlypivoted relative to the base 10 and is foldable on the base 10.

With reference FIG. 4, in an initial stage, the adjusting rod 30 isinserted into the two openings 114 and is received in the two aligningslots 23 for engaging two of teeth 22. Each opening 114 inclinedlyextends toward the bottom surface of the base 10 and the each slot 23inclinedly extends toward the upper part of the backrest plate 20, suchthat adjusting rod 30 is locked in the two openings 114 and the twoaligning slots 23 along difference directions. The backrest plate 20 isrestricted by the adjusting rod 30 and is fixed relative to the base 10.

With reference FIG. 8, when the adjusting rod 30 is pivotally pulled atthe axis of the linear connection of the two tips 32 and is detachedfrom the two opening 114. The backrest plate 20 is released and ispivotable relative to the base 10 such that an angle between thebackrest plate 20 relative to the base 10 can be adjusted. When theadjusting rod 30 is released, the two elastomers 50 are elastically pullthe adjusting rod 30 to restore the adjusting rod 30 into the twoopening 114 and be received in other two aligning slots 23.

With reference to FIG. 9, due to the decoration and comfort, the base 10and the backrest plate 20 are respectively assembled with two sponges50. Two leather coats 60 are respectively covered on the base 10 and thebackrest plate 20 such that the seat in accordance with the presentinvention is formed as an adjustable sofa.

Even though numerous characteristics and advantages of the presentinvention have been set forth in the foregoing description, togetherwith details of the structure and function of the invention, thedisclosure is illustrative only, and changes may be made in detail,especially in matters of shape, size, and arrangement of parts withinthe principles of the invention to the full extent indicated by thebroad general meaning of the terms in which the appended claims areexpressed.

What is claimed is:
 1. An adjustable and pivotable seat comprising: abase having a receiving portion disposed on one end of the base, thereceiving portion having a receiving space defined in the receivingportion and an opening inclinedly defined through the receiving portion,extending toward a bottom of the base and communicating with thereceiving space; a backrest plate pivotally connected with the base andhaving multiple teeth disposed on the backrest plate and multiple slotsrespectively defined in between the teeth, the teeth correspondinglyreceived in the receiving space in the base and being movable relativeto the receiving portion, each slot disposed between adjacent two of theteeth and extending toward an upper part of the backrest plate which islocated higher than the teeth; and an adjusting rod selectively insertedinto the opening and selectively engaging one of the slots, theadjusting rod having at least one connecting arm extending from theadjusting rod for movably connecting with the base.
 2. The adjustableand pivotable seat as claimed in claim 1, wherein the base has at leastone fixing groove defined in the base for corresponding receiving the atleast one connecting arm of the adjusting rod such that the adjustingrod is pivotally connected with the base.
 3. The adjustable andpivotable seat as claimed in claim 2 further comprising at least oneelastomer mounted on the base and each one of the at least one elastomerhaving two end respectively connected with the base and the adjustingrod.
 4. The adjustable and pivotable seat as claimed in claim 3, whereinthe base has at least one connecting hole defined in the bottom of thebase.
 5. The adjustable and pivotable seat as claimed in claim 4 furthercomprising two sponges respectively mounted on the backrest plate andthe base and two coats respectively mounted on the backrest plate andthe base.
 6. The adjustable and pivotable seat as claimed in claim 1further comprising at least one elastomer mounted on the base and eachone of the at least one elastomer having two end respectively connectedwith the base and the adjusting rod.
 7. The adjustable and pivotableseat as claimed in claim 1, wherein the base has at least one connectinghole defined in the bottom of the base.
 8. The adjustable and pivotableseat as claimed in claim 2, wherein the base has at least one connectinghole defined in the bottom of the base.
 9. The adjustable and pivotableseat as claimed in claim 6, wherein the base has at least one connectinghole defined in the bottom of the base.
 10. The adjustable and pivotableseat as claimed in claim 1 further comprising two sponges respectivelymounted on the backrest plate and the base and two coats respectivelymounted on the backrest plate and the base.
 11. The adjustable andpivotable seat as claimed in claim 2 further comprising two spongesrespectively mounted on the backrest plate and the base and two coatsrespectively mounted on the backrest plate and the base.
 12. Theadjustable and pivotable seat as claimed in claim 3 further comprisingtwo sponges respectively mounted on the backrest plate and the base andtwo coats respectively mounted on the backrest plate and the base. 13.The adjustable and pivotable seat as claimed in claim 6 furthercomprising two sponges respectively mounted on the backrest plate andthe base and two coats respectively mounted on the backrest plate andthe base.
 14. The adjustable and pivotable seat as claimed in claim 7further comprising two sponges respectively mounted on the backrestplate and the base and two coats respectively mounted on the backrestplate and the base.
 15. The adjustable and pivotable seat as claimed inclaim 8 further comprising two sponges respectively mounted on thebackrest plate and the base and two coats respectively mounted on thebackrest plate and the base.
 16. The adjustable and pivotable seat asclaimed in claim 9 further comprising two sponges respectively mountedon the backrest plate and the base and two coats respectively mounted onthe backrest plate and the base.